A CONTROL STRATEGY FOR A CONGESTED, COMPUTER-CONTROLLED TRAFFIC NETWORK

IT IS SUGGESTED THAT TRAFFIC LIGHT GREEN TIMES SHOULD BE ADJUSTED TO BALANCE THE QUEUES ON ITS VARIOUS ARMS DURING CONDITIONS OF HEAVY CONGESTION. IN THIS MANNER THE VEHICLES QUEUES MAY BE ARRANGED SO THAT THE MINIMUM NUMBER OF JUNCTIONS ARE BLOCKED BY WAITING VEHICLES. THIS STRATEGY INVOLVES THE USE OF SAMPLED DATA FEEDBACK LOOPS AT EACH JUNCTION AND THERE ARISES THE POSSIBILITY OF INSTABILITY DUE TO THE POSITIVE FEEDBACK EFFECTS OF TRAFFIC COUPLING. THE DYNAMIC BEHAVIOR OF AN ISOLATED JUNCTION IS FIRST CONSIDERED AND THE ANALYSIS IS THEN EXTENDED TO A NETWORK OF JUNCTIONS. IT IS SUGGESTED THAT THE STABILITY OF THE NETWORK MAY BE IMPROVED BY THE USE OF COORDINATING SIGNALS TRANSMITTED BETWEEN JUNCTIONS, AND STABILITY CRITERIA FOR THE CONTROLLER PARAMETERS ARE ESTABLISHED. /RRL/A/

• Supplemental Notes:
  • Vol 2, No 4, PP 391-408, 9 FIG, 3 REF
• Authors:
  • Longley, D
• Publication Date: 1968-12

Media Info

• Serial:
  • Transportation Research /UK/
  • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

• TRT Terms: Adjustment factors; Computers; Equipment maintenance; Intersections; Networks; Queuing; Traffic congestion; Traffic control; Traffic signal control systems; Vehicles
• Uncontrolled Terms: Equipment adjustment
• Old TRIS Terms: Traffic control systems
• Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00225303
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Apr 27 1970 12:00AM